open() mode args

[mpnordland]

What is the correct file mode to pass to open() when I want to both read
and write on the open file?

 

[Steven D'Aprano]

What is the correct file mode to pass to open() when I want to both read
and write on the open file?

open("filename", "r+") for text mode, "r+b" for binary mode. If your
operating system does not distinguish between the two, you can use either.

More detail is available in the Fine Manual, or in the interactive help:

help(open)

at the Python prompt.

 

[mpnordland]

thanks